'Try confining your eating window to 12 hours,' Dr Chatterjee recommended. 'Research shows that changing when you eat as well as what you eat can be beneficial in terms of weight loss, immune function, blood sugar balance and the health of your gut microbiome.

'If you give you gut bugs a break, you encourage the growth of other bacteria that help to clean out your gut lining.'

He continued: 'It’s not that hard either – ideally you’re sleeping for eight of those 12 hours. The modern world gets in the way, but try having breakfast at 8am, and finishing dinner around 8pm.

'It’s achievable for most of us, and the research indicates that it’s good in terms of longevity. It makes sense in terms of studies around circadian rhythms, and it’s a bit like sleeping – you need to give your brain a break. Same with your gut.'

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